Let's start fresh with some more information from you.
Some of this basic info that will help the members give more helpful replies to you.

1- What state are you living in now?

2- what year did your SSI start?

3- what year did your SSDI start?

4- Do you keep those agencies updated on your current address?
(If not it may be why you don't have some information that we need to answer your questions)

There may be other questions about facts that members will have , I hope they ask them here so we have all the details in a single thread vs spread over 3 different threads.

SSDI and SSI are federal programs. The rules apply to every SS office in the country.

Prior to my son turning 18, he received an additional benefit of 50% of my monthly benefit. Let's say my monthly check was $1500--he received an additional $750.

Regarding backpay, it is not a myth. Both my son and I (as well as many other NT members) received several years of backpay. It is incredibly common for people to receive it. Since you received your first check a "week after applying", obviously you would not be entitled to any backpay for yourself. And in the post you wrote yesterday you mentioned your "son's account", so it sounds like at least one of your children is also receiving some type of benefit as well, so in all likelihood your children have already received all the benefits they were entitled to.

BTW, this post states you are a family of four. Previously you stated you had a wife and 3 children. In your first post you claimed to be supporting 12 people on $600.

A Continuing Disability Review is something that almost all SSI/SSDI recipients go through. It can happen as often as once a year, or as infrequently as every 7 years. It's either a short form or a longer one asking questions about your health, treatment, work status, etc.

It sounds like you're happy with the benefits you're currently receiving and managing well. It doesn't really matter that you become more knowledgeable about SSI and SSDI if you're clear that you're already receiving all the benefits you and your family are entitled to.

Best of luck to you.

1. WA
2. 2002
3. 2002
4. That is the law. And they never send me anything important. Just 10 pages of what I already know, or that I get $50 more this month, or $50 less this month. You know, the typical over/under -payment letters they send out.